Generally it takes a week to a month after the reviewers get their hands on it. With AAA games, since they have to go to manufacturing they have a month delay anyhow, so stuff is ready right at launch. With indie games, there's not usually a lag quite like that unless the indie is unusually flush with cash or unusually low on fixed expenses. In our case we got the game in the hands of maybe six reviewers a week before the game came out, and then in the hands of 300ish more at launch and after. A lot of those 300 are youtubers or what have you, etc, too.
There's been a lot of interest in reviewing the game, frequently 1-2 requests from the press coming in per hour during US working hours over the last week. We'll see how this really winds up going in the end, but there's nothing out of the ordinary yet (aside from an above-average interest in talking to us at all on the part of the press).